Mercruiser Alpha 1 Gen 1 Stern Drive Repairs Part 7: How to Install/Adjust Limit/Sender Switches
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- เผยแพร่เมื่อ 28 ก.ค. 2024
- tilt/trim sender limit kit (PAID LINK): amzn.to/3pLvhw9
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Continuing with this bass boat restoration- I'm installing trim limit/sender switches on a Mercruiser 260/Chevy 350 stern drive on my Ranger 395-V I/o bass boat. A trim limit switch is a safety device which keeps the driver from over-trimming the drive. The trim sender switch is used to send a signal to the trim gauge as a visual cue to what your trim is set at. Please like and subscribe to receive notification of future videos! See the comments for pictures of the wiring on my boat.
Sender explanation starts at 4:45 in the video
More of my boat repair TH-cams:
• Bass Boat Repairs
#trimlimitswitch #trimsenderswitch #Mercruiser260 #sterndrive #Rangerboat #Ranger395vio #boatrepair #boatenginerepair #sterndrive #trimsenderkit #bassboatrestoration #prowrenching
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Pro Wrencher is a mechanic who has experience repairing everything from old farm equipment to autos/trucks/boats to locomotives. He lives in an old house and drives old cars and has old boats- giving him a lifetime of stuff to repair!
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tilt/trim sender limit kit (PAID LINK): amzn.to/3pLvhw9
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Good morning on the 23rd. I am recouping from my second stroke. This is my project. I’ve never done or tackled or used this type of boat before so I’m gonna use your brain in your information immensely now I have to work on the pump motor itself. I see that it has two burner relays on it so now we’re gonna get this trim working correctly, and this is definitely a project boat. Can’t say enough good things about these videos.
Thank you! I appreciate that. 👍 to you on your recovery and your boat project.
All my wires corroded and broke was rebuilding the pit drive and couldn’t find a diagram to tell me why there were one on each side. You helped me a ton. Thank you sir. Subscribed and liked
Awesome! Glad that helped you. Thanks for subscribing!
I just wanted to thankyou so many videos are people who have no idea what there doing or thing your a expert already. I like you showing everything and not skipping the simple stuff. I watched your rebuild stern drive rebuild and I feel that I can do this job now. I just paid the marina a $2000 . to do what you just taught me. whish I had watch this first rookie
Thank you for the compliments! Glad to hear my videos are helpful.
marina's near here are booked thru 2022. DIY or nothing
Very helpful video. You do great at walking the viewer through the process
Thank you
Thanks for the clear explanation, just did mine and works like a charm. Thanks for posting!
Thank you! Glad the video was helpful.
Thank you so much. This helped me out tremendously. Very thorough explanation.
Thanks!
Pro Wrench is the real deal. Great info & thanks for the help kind sir.
Awesome! Glad to be of help. Thank you.
Great video. I need to adjust mine. Thanks!
Thank you
Thanks, you helped me a lot with this video.
Awesome! Glad the video was helpful.
Thanks for sharing.
You’re welcome! Thank you for watching.
Really great video. An Irish boater.
Thank you!
Wow, great videos, thanks man.
Thanks.
Excellent. Thanks
Thank you
Great job
Thank you
Great knowledge
Thank you
Good vid thank you
Thanks
Thanks!
Thank you! I appreciate it!
Great video thanks a lot
Thanks!
buy trim sender and limit switch from our shop :www.amazon.com/dp/B09BQTRPFX
Mine does not have a gauge (I will be adding one though). The wires instead went to a plastic block at rear of engine and connected into the ignition wiring. Could I assume they had it wired so the engine wouldn't start with the drive up? I didn't matter either way as the wires were broken off at the sender.
On my boat- the trim limit switch is set to limit the amount of trim available at the trim switch on the throttle. The sender switch is just a position switch that goes to the gauge. I haven’t heard of the sender switch being used to limit starting. You don’t want to start the engine when it’s trimmed up in the trailer position, so I suppose it’s maybe plausible that could have been for that reason.
Came across this video and tried to apply it to my Alpha One. Unfortunately, it didn't put my gauge "back to work." It appears that I'll need a new gauge which I'll likely defer until next year as the drive is operating fine. Thanks for posting. Very helpful.
If you haven’t already, you may want to also check the wiring to the gauge to make sure it’s not a wiring issue.
@@ProWrenching It's funny, last night I was out cruising the Erie Canal and I suddenly see the needle bounce back to the down position. I toggled the throttle switch and it immediately pegged to the UP position. It kept doing bouncing back and forth all night. So maybe it is a wiring problem. We'll see. Thanks
@@daniels.9206 yea- sounds like it could be wiring. Let me know what you find out!
Great job and unstuck. Question for the Pro, can you run wires without disassembly of outdrive? My system works, however, frayed wires on sending unit side. The gauge not reading. Thank you sir.
Thanks! It would be very hard to replace the wires without removing the outdrive. I believe it has been done, though.
Thank you, I have a bravo 3 sterndrive. On a Volvo penta 5.7 engine.
Just recently it is acting funny. The trim
Cylinders, When I trim
up or down it takes longer than usual. Do you know what the cause might be. Thank you.
If everything is working, but just moving slower, i wonder if you may be having an issue with your hydraulic pump. I would check the fluid levels and make sure the battery cables that are connected to the pump are not corroded and have a good connection to the battery.
Great video, explains well,
Another question but not about your video.
Are there grease fittings in side the boat that need greased on the stern drive alph one? I greased on the outside of the drive. Thanks
There is one grease fitting that is on the steering assembly that is inside where the motor is. Some couplers have a grease- zert and others do not . Mine does not and you just have to put grease in the splines of the coupler by hand once a year when you do the annual service.
Supert.....from Norway
Thank you
Hi There! I have an Alpha 1 Gen 1 stern drive as well which was my grandfathers and I think he had the trim limit removed or set to very high because we dock the boat in very shallow water. I recently had the gimbal bearing replaced and they also ran new wiring for the trim limit and sender switch because the gauge had stopped working, but the trim still worked. Only thing now is that the trim limit using the trim button is not high enough, and I am have to use the trailer button (which is very hard to press) to get the prop up high enough. Can I simply loosen the portside screws on the trim limiter and turn it so that the limit will go as high or very close to the highest it would go using the trailer button? Appreciate your help in advance!
I would double check your trim limit measurement to make sure that it’s at the recommended 21 and three-quarter inches max limit for trim up.. It is not recommended operating the boat above that measurement.
Do I have to remove the outdrive to run the wires or can it be done with the outdrive on. I seen in your video before this one you had the outdrive off
It would be very hard to replace the wires without removing the outdrive. I believe it has been done though.
My dad has an alpha 1, gen 1. The port side is currently affecting the trim guage and starboard has no impact. I assume that would imply the wires are switched? In your video, you aligned the marks on port & loosely attached. Then raised until 21 & 3/4. But you didn't seem to indicate how you adjusted the port sender before tightening it down. What did we miss? Our boat does not have a trailer switch. Three buttons, middle + top raises, bottom lowers. Middle + bottom lowers, middle only does nothing. Does that imply incorrect wiring as well? Is middle + top button the equivalent of trailer switch & middle button not currently working, the actual trim switch we should be using to adjust?
The port side is the trim limit switch. The idea is that you shouldn’t be able to trim the motor higher than the the limit measured amount and you adjust that switch to be within those limits. The starboard side should go to the gauge that is on the dash and you adjust that switch to correspond with the gauge reading that is on the dash. It sounds like your boat has the wires mixed up.
Limit only controls up, I am told.
What grease did you use when putting the sender and limit in?
I used silicone dielectric grease during the assembly and Lucas Red & Tacky on the grease zerts (PAID LINK): amzn.to/3qixWO9
DISCLOSURE: As an Amazon Associate I earn from qualifying purchases.
Amazing video. Is there any way to test that sending unit prior to replacing? I have power from the “up” button to the top wire. Will/should their be power at the bottom wire? The top wire is exposed but even out of water it doesn’t trim up with the up switch but does with the trailer button.
Thanks!
If the trim limit switch is working and adjusted correctly there should be power through the switch going to the bottom wire. If there is not, the switch is defective.
Ok I took it apart and it was off the contacts somehow. Like a half turn. Not sure if the previous owner his something with the prop and it jumped or what. I took the inside piece out. Rotated it to hit contacts and it worked. Now to just adjust it to down and up. Your video saved the day. Thanks again.
@@kingiscmn Well thank you. I’m glad it helped!
I’m a noob so what do you use in the grease fitting?
How did you adjust the sender side?
That can be found at the 4:45 mark in the video
I recently purchased a old 88 sea ray. Trim goes down from the switch on the shifter. It will not come back up. I have to use the trailer up button. Also my trim gauge needle don’t move to indicate position. Where should I start to troubleshoot? I was told it could be a bad relay on the trim pump? It don’t do anything nor make any noise when trim up on the shifter. Any help would be appreciated. Enjoy your channel. Subscribed.
First off, thanks for subscribing. I appreciate you watching the channel. My boat did the same thing- it would trim down from the switch on the shifter but would only trim up with the trailer switch. That is what it will do if the trim limit switch or wiring is bad. On my boat, the wiring was deteriorated going to both the trim and limit senders. I had to replace both trim limit and sender switch to get them to function correctly.
To start, I would look at the wiring and bullet connectors for corrosion going to the trim limit switch, check the adjustment on the trim limit switch. The trim sender switch controls gauge needle and is most likely defective, but could be out of adjustment too.
@@ProWrenching I cleaned my trim switch up. It works fine now. I took it apart and cleaned the contacts. Also had to totally readjust it. Whoever messed with the boat in the past didnt have it set right. Now I need to get the trim gauge figured out. I'll start with the trim sender first. I'll take it apart and clean it. Ill check the wiring on the back of the faria gauge. And go from there. I'll also check the ground behind my engine on the transom wall, and check for any wiring issue between the sender and gauge. Any other tips, I'd appreciate. Thanks.
@@larrywalden626 sounds like a good plan to get your trim sender going- i think you’re on the right track. I’m glad you were able to get your trim limit switch figured out.
I have a alpha 1 is 21 3/4 inch where it needs to be set On the port ?
If it is a Gen One- yes.
Thank u 🙏🏽 I learned a lot from your video!!!
@@jimmiejohnson1404 thank you. Glad it was helpful.
Once you have the lenght at 21 3/4 how so you actually Set that limit? The 21 3/4 is regardless of whAt boat it’s on?
That measurement is for an Alpha One Gen One stern drive, which comes on many different makes and models of boats.
@@ProWrenching curious what state the drive is in with this measurement? I think you said that may be the trim limit, so the lowest the drive will go?
@@tonyboy2740 the trim limit limits the angle that the drive will be operated at when the boat is in operation. It limits the amount that you can trim the stern drive up from the controls and the trim switch.
Nice. Thanks. Now if I could just see my gauge from the ground. 😖
It's ok. I'll find someone to help me.
I’m glad you found the video useful. Good luck on your project.
@@ProWrenching oh it's not an project. ☺️ It's my job. Boat mechanic. I just needed to find the spec for the trim limit. Been a while since I've done one of these. Who can afford a library of service manuals, am I right? 🤣
@@thediplomasta5891 Yep- that’s why I like TH-cam! Who needs service manuals, lol.
Dang wish you showed how you ran the wires
Hi i have a gen 2 and its 20 3/4" is that all the way up or down ?
Also where is the trailering switch?
All the way up
@@baldodiaz5585 On my boat the trailer switch is a square button that is on the controller and is a couple of inches below the trim switch.
@@ProWrenching thank you i will adjust and check this weekend.
One more question when i adjusted the trim sender to the guage it only raised to trim is that normal?
Then when i hit the trailer switch it goes all the way up
The trim gauge needs to show the range of motion of your sterndrive -should be reading at the bottom when the stern drive is all the way down and should be at the top when the drive is trimmed all the way up.
It reads all the way down but i set it to 20 3/4" all the way up and when it only reads half way on the guage
@@baldodiaz5585 It sounds like you have the trim limit set correctly now. Now you need to adjust the trim sender which is on the other side and affects only the gauge reading.
Its weird i adjusted it but same thing only shows half way up when I adjusted it
I just got a boat I'm rebuilding and the trim senders were never wired into anything. Where do I go to figure out which wire goes to where on both of the senders. where do I wire them in? I cant find any connections i the harness.
On my boat, for the trim limit switch- one wire goes to a blue and white wire, the other wire goes to a purple and white wire. The wires are by the pump for the stern drive cylinders. Here's a picture of how it is on my boat:
drive.google.com/file/d/1WaA2XNyWrVJLzj32MmN9ccQZpDmkISoW/view?usp=sharing
For the trim sender, one wire goes to ground and the other wire goes to a brown wire that goes to the gauge on the dash.
@@ProWrenching Are These wires are coming from the trim/sender port and star pucks? all 4 (2 & 2) wires are black on mine
@@RigelStudiosLasVegas There are 2 black wires coming from the trim limit switch on the port side and two black wires coming from the trim sender switch on the starboard side.
@@ProWrenching correct, but does one wire from each go to ground, and the other wire from each go to brown?
SO when you're trimming down it doesn't cut off when you're in full down position , but it does limit how far UP you can trim?
That is correct. The trim limit switch limits the amount of angle you can trim up with the trim up button. You can use the trailer button to trim the drive up the max amount when trailering the boat.
You did not explained adjustment on trim limit
Nice job on guage instructions. But not so good on trim limit. You didn’t explained how to adjust switch
Hey brother heeeeeelp I install the sensors but the old ones was disconnected so I don’t know where they go please help
Ok- on my boat for the trim limit switch, one wire goes to a blue & white wire. The other one goes to a purple & white wire. The wires are by the pump for the stern drive cylinders. More.....
For the trim sender- one wire goes to ground and the other wire goes to a brown wire that goes up to the gauge. I’ll post some photos....
Photo of trim limit switch on my boat:
drive.google.com/file/d/1WaA2XNyWrVJLzj32MmN9ccQZpDmkISoW/view?usp=sharing
Photo of trim sender ground location on my boat:
drive.google.com/file/d/1zcVnHCkui8nRYQAlQinUFCLJzIoLzMJd/view?usp=sharing
Photo of trim sender wire that goes to gauge on my boat:
drive.google.com/file/d/1pV2_h_Ws6DsXmAacirANMPOHo1ay6iIS/view?usp=sharing
I'm a little lost on the actual positioning of the sensor and tightening it down once I suggested. The video didn't really show what you were doing with the switch when you were adjusting the trim height. Do you adjust the trim height with the trailer trim button until you get it to the right measurement and then rotate the trim limit switch completely counterclockwise and tighten it?
You just have to work with the limit sender until the maximum trim up length is met when going up with your trim up button. You need to have it set up so when you’re using your trim up button, it doesn’t go past the max length for your unit. You just have to play with the limit sender adjustment until it is correct.
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He never says how to adjust the switch. What way do you turn the switch to set trim limit.
After the switch is aligned and installed, you first rotate the switch clockwise until it stops and then you rotate counterclockwise until you get the correct measurement.
After the switch is aligned and installed, you first rotate the switch clockwise until it stops and then you rotate counterclockwise until you get the correct measurement.
What makes my boat wanna stand straight up?
Sounds like you may have the lower unit trimmed too high during takeoff. After the initial rise, does it get on plane?
Yes it will plane out after it gets going.also I've recently changed the gear oil in unit bled the trim pump.i noticed a vibration that is affected by speed and trim.and my exhaust bellow tore in half got one coming but what will be damaged by that
@@brianweaver1541 It sounds like you need to remove the lower unit and check the drive shaft bellow and gimbal bearing to make sure water has not entered it and caused damage to the drive shaft joints or gimbal bearing. It’s recommended to remove that annually and inspect it.
A tear in the exhaust shouldn’t damage anything- will just cause your exhaust to be louder.
Ok if its trimmed to high.im guessing that trim sender on the side will need changed.i know it won't come off w out destroying it.and if thats the case trimming it lower will make it run flatter and probly pull tubes and boards better?as far as the the main switch on dash its going down as far as it can..but the gage doesn't show up or down so in t he water I put it down as far as it can and guess on the way up.and last question and I'll stop bugging you.what's is the hose on rear starbird.it looks like a vacuum hose that runs straight down to a plastic piece that fits in a slot kinda hangs underneath as well
What's the part number?
I used a no name brand that is equivalent to Mercury Quicksilver Sender kit 805320A03.
21 3/4
Damn that's an old boat
Yep. It’s an ‘84 and still solid. They built those old Rangers like tanks.
@@ProWrenching yes they do, I had a 79 Ranger 176v very well built.
You totally skipped how to turn to adjust which way and where to start at and clockwise or counter clockwise?
For the trim position sender installation, place stern drive down in full down position. Turn the center rotor of trim position sender to align index mark with index mark on sender body. Turn the ignition to the on position. Then you would rotate the sender either clockwise or counter clockwise until the needle of the trim gauge is at the bottom of the arc then tighten your screws and recheck the gauge.
For the trim limit installation align your index marks on the switch then install the limit switch then loosen the screws and turn the trim limit switch clockwise to the end of slots place the drive in the full down position. Trim drive up do not use the trailer switch. Slowly turn trim limit switch counter clockwise until trim cylinders extend to 21 and three-quarter inches.